Preparation method of multifunctional membrane containing modified boehmite

A boehmite and multifunctional technology, which is applied in the field of preparation of modified boehmite-containing multifunctional films, can solve the problems of strong water solubility and loss, and achieve the effect of convenient graft modification

Inactive Publication Date: 2019-08-06
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the membrane is prepared by the blending and assembly method, the polymer containing carboxyl and sulfonic acid groups has a strong water solubility, and there is a risk of being dissolved in water and continuously lost during use.

Method used

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  • Preparation method of multifunctional membrane containing modified boehmite
  • Preparation method of multifunctional membrane containing modified boehmite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing a multifunctional membrane containing modified boehmite, the method comprising the following steps:

[0031] (1) 50 grams of boehmite (0.83mol) was added to 800 milliliters of distilled water to disperse, and ultrasonically treated, 3 grams of hydroquinone was added after 5 minutes; then slowly added methacrylic acid (154g, 1.8mol ), the reaction was carried out for 20 hours under stirring at 70° C., the solid product was washed with deionized water, and finally dried in vacuum at 50° C. for 20 hours to obtain esterified boehmite.

[0032] (2) Mix 20g of polyethersulfone, 1g of esterified boehmite, 1g of polyvinylpyrrolidone and 78g of dimethylacetamide, stir at 60°C for 24 hours to form a solution, use water as the gel medium to form a film, and the evaporation time for 30 seconds, and the membrane was soaked in water for 24 hours.

[0033] (3) Prepare 3wt% acrylic acid, 0.015wt% potassium persulfate, and 0.5wt% ethylene glycol aqueous solution ...

Embodiment 2

[0035] A method for preparing a multifunctional membrane containing modified boehmite, the method comprising the following steps:

[0036] (1) Disperse 10.0g of boehmite in 250mL of xylene, add 48g of acrylic acid, reflux the mixture in xylene at 138-145°C for 72 hours, distill off the xylene under reduced pressure, wash the solid with ether to remove impurities, and dry it to obtain White esterified boehmite powder.

[0037] (2) Mix 24g polyvinyl chloride, 5g esterified boehmite, 8g polyethylene glycol and 73g N-methylpyrrolidone, stir at 60°C for 24 hours to form a solution, use water as the gel medium to form a film, and the evaporation time For 10 seconds, the film was soaked in water for 26 hours.

[0038](3) Prepare 800 milliliters of ethylene glycol aqueous solution containing 3wt% sodium p-styrenesulfonate, 0.015wt% ammonium persulfate, and 0.5wt%, pour it into a film-filled container, ventilate nitrogen, and heat to 65- 70°C, reacted for 4 hours, then washed with wa...

Embodiment 3

[0040] A method for preparing a multifunctional membrane containing modified boehmite, the method comprising the following steps:

[0041] (1) 50 grams of boehmite (0.83mol) was added to 800 milliliters of distilled water to disperse, and ultrasonically treated, 3 grams of hydroquinone was added after 5 minutes; then slowly added methacrylic acid (154g, 1.8mol ), the reaction was carried out for 20 hours under stirring at 70° C., the solid product was washed with deionized water, and finally dried in vacuum at 50° C. for 20 hours to obtain esterified boehmite.

[0042] (2) Mix 16g of polyacrylonitrile, 0.5g of esterified boehmite, 1g of polyvinylpyrrolidone and 82.5g of dimethyl sulfoxide, stir at 60°C for 24 hours to make a solution, use water as the gel medium to form a film, evaporate The time is 30 seconds, and the membrane is soaked in water for 24 hours.

[0043] (3) Use 500 milliliters of aqueous solution to prepare methacrylic acid containing 3wt%, 0.015wt% sodium per...

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Abstract

The invention provides a preparation method of a multifunctional membrane containing modified boehmite, belonging to the field of composite materials. The preparation method comprises the following steps: esterifying boehmite with an organic acid containing double bonds to obtain esterified boehmite containing the double bonds; using the esterified boehmite, a polymer, a pore-forming agent and a solvent to prepare a membrane liquid, and using a phase inversion method for preparation of a membrane; and finally, soaking the membrane in water containing an initiator, a monomer and a small amountof crosslinking agent, and performing graft polymerization under the protection of nitrogen to obtain the multifunctional membrane containing the modified boehmite. The membrane has the characteristics of good hydrophilicity, large permeation flux and good pollution resistance, the pore size of the membrane can be adjusted through pH value, metal cations, cationic surfactants or cationic dyes andthe like in water can be rapidly adsorbed through ion exchange or complexation, and anions, anionic surfactants, anionic dyes and the like in the water can also be intercepted through charge repulsionand size repulsion.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a preparation method of a multifunctional membrane containing modified boehmite. Background technique [0002] Boehmite (γ-Al00H) contains a large number of hydroxyl groups, has good hydrophilicity, and has a certain adsorption capacity, and can be directly used in the preparation and modification of membranes. For example, boehmite can be used to prepare microfiltration membranes (patent: a preparation method of a composite ceramic microfiltration membrane, a preparation method of an environmentally friendly ceramic microfiltration membrane, etc.); Soak fiber in boehmite solution to obtain a modified PVDF ultrafiltration membrane with strong hydrophilicity, high membrane flux, and strong anti-pollution ability (patent: a modified ultrafiltration membrane and its preparation method); Boehmite prepared adsorption film. [0003] The esterification reaction of boehmite can be us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02
CPCB01D67/0079B01D69/02B01D2325/14B01D2325/36
Inventor 黄征青余靖邦严钰王琪程正发
Owner HUBEI UNIV OF TECH
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